Combined squeeze and jolt ramming machine.



T, J. MUMFORD, 20. COMBINED SQUEEZE AND JOLT RAMMING MACHINE.

APPLICATION FILED FEB. 25'. ms.

" 1,242,364. Patented Och-9,1917.

a SHHTS-SHEET 2.

T. 'I. MUMFORD, 2D.

COMBINED SQUEEZE AND IOLT RAIVIMING MACHINE. APPLICATION FILED FEB. 25.IBIS,

1 %2,54h Patented (m, 9.1917.

3 SHEETS-SHEET 3.

v V lrrwwyaws rno vms J. Melanoma, or .rLA IN'rrEnn, vnvv VJE1$ EYL Toall whom map obncewnl Bait-known that, I, CE oMAs -at Plainfield intherGQunty-QtUnion-and Stateof New Jersey,;h ave invented certain new Land;usei:'ul Improvements in Combined Squeeze :and Jolt Hamming -Machines,of avhich the following is ga specification.

. This ,inventionyrelates toimprovements in squeeze; and .j oltramming;-moldingymf chines,v that; is to say, I machines which; are capable ofbeing .used to carry; 1 on .a squeezin 0 eration and also a 'oltrainmin'.9

eration. The invention has particular ,ref-

erence to that "type of molding. machine .;knoWn:as a high trunnionsqueezer although pit issapplicable to other formsof pOWeIUQp- .erated,molding..machines. 7 p g It is, one .of the. iprimary objects; of myinvention. toeprovide; an improved molding machine ,of theeharacterspecified 'Whiohis simple and economical in .cQnstructiOnand suchmachines, and at :j minimum expense. While, as mntedout, completemachines embodying mylinvention maygbezconstructed w le m0'22055z1:willshow. and? describe :my in- 1 ivention as it is used intransforming: stand nion squeezer tovvhich my invention-is to -a'rd'forms ofxipmver Esqueeze .machines into i a 'combinedngoltand-;squ-ee;emach1ne.

=-lhe2forego1ng,- itogether with-such other objects as may hereinafterappeariqorq are incident :to :my invention I attain by. means of; ajc'o'nstruction :wvhichjfl have shown: in p eferred form 111 'th6=accompanyingwdraw ingsgwherembe appliedg -Fig. .2. isa similarvieW,j-but with {my improvements: eLmbodiedgtherein; Fig.

3 is an enlarged sectionjalivievv of porti on 0f} the apparatusshown Elgf 2 andiEig.

' 4is a sectional .detailwtaken-on the line J M MroRD, 2d,,a citizen ofth'ezUnited States, residing v co /rerun]: sounnznn vn JOL'I RA MNGMAQHINE.

Specification of Letteislatent; V Patented flxct, 9, 191.7; Applicationfilediehruary25,1216; i s r vol sases. i I

the machine comprisesa base? which is .preferably composed of tvvolegsformed to support a cylinden member 8, andLthe squeezing plungerQJup n Which are carried gthe moldgparts to operated upon. .Mount' edon. thGgtQPQf the base and to the rear ,thereofjis an upstanding post10, to the ;upperportion of which is pivoteda-ramm ng yoke 11' in Whichthe ramming'block .l2j1s adjustablv mounted :by' means of the -,threadedstem 13. At '1. the front, the yoke is in operative positionis; hookedover. a .pro-

ljection or lug l5. f0rmed; on the cylinden 8,

which link takesthestrain of the-squeezing.

In rde tha -th y k may b ea ly -.n pu t' d1;bef rea after a sq eezin Pratie e: theasp ng .1 g -p d 6 9 19 1 n s h .p te ting .1 atom ,lend andthe y ll. at h h nd. 1 1 1 ,preS n-e is; admit ed into th b o tith cyinder 8tQsOP I tQIh p u g ill t usual manner... 1111;,tl1e. type ofmachine ishown' themcup leatherlfhis used in-,'place' of. the.standardgpiston.ring- V ltmnsfOrmingit iS m hine into: a comr blined(squeeze andv joltdrammingwmachine, theoperation is as follows; Theplunger 9.-is

.inemoved iand .is (tapped, was; at- 18, 1,110 receive '1 The.-.p1.unger.;is, also; drilled at .plurality -01? ;poin.ts1;.t0'provideusurgegports ;21,;;.(see' -riEigs.-w,2nancl; 3) .LThe cylinder 8:is also-me- @moved; from ltliepmachineand the end face thereof l is,.machined for; .the attachment .of

the. j olting cylinder .22; A -.central3 opening 23 is" also drilledinthe bottom ofithe cylin- Jder, 1 SL1Ch ;.opening having; -.diameter'f. ;greater than that of the ,jolt plunger; 20, and

;it iisf tapped, as; indicated at :24; ttosreceive :the'studs'. 25 whichserve .to retain the-2:1 olt- :ingcylinder 22 ...in position.Thecylinder: 22

' is provided .Wltll an .ii1let portr26 .and with an I exhaustazportZ27, the inlet. port being v preferably; controlled .by :a valve 128,1;said valve. .beingg normally; in 1 open .positionr un .of :the duct230." The" stem 31 .ofathe r-valve .;proj ects .into :the cylinder 22 inposition 'ito :gb engagedlby the .joltlplungerQO as thelat- -zter :movesdownwardly; 'rlntentnediateg'eits rfthe threaded .portionfilil =-of agjolt operating piston- 20-;vvhich 5Wlll-ib6gfl11ih6i' described.

end the plunger 20 is provided with a reduced portion 82 which providesan annular space 33 communicating'with the upper end of the inlet port 26. Air pressure finds its the plunger 9, such member comprising aleather ring or pad 37 which is retained: in normal posltion by means ofa stifi'ening member 38, preferably sheet steel. A1r 1s introduced for asqueezing operation into the cylinder 8 beneath the impact and valvemember A through the port opening 39.

When the machine is operated as a squeezer, assuming that the moldparts'have been placed in position on the plunger 9, and that the yokehas been brought into operative position and locked, air is introducedinto the cylinder 8 beneath the member A through the port 39 and theplunger 9 is thereby elevated and squeezes the mold, during suchoperation the member A acting as a valve to close the surge ports 21formed in'the bottom of the plunger 9; When, however, the machine isutilized for a jolt ramming operation, air is introduced into thecylinder 22 through the inlet port 26 and port openings 34 and35,-thereby elevating the j olting plunger 20 which carries with it theplunger 9. When the plunger has been raised a distance sufficient tocause the annular chamber 33 to communicate with the exhaust port 27,there will follow, because ofthe exhaust of pressure, a re duction ofpressure in the space above the valve 28 which, in conjunction with thepressure which accumulates beneath the lower o face of the valve, willcause the valve to move upwardly to closed position, covering the inletport 26. Upon exhaust of pressure within the cylinder through theexhaust port 27 the plunger and its associated parts will fall, theimpact being received by the repeated until such time as the mold. has

' been jolt rammed andthe operator turns off the valve controlling thesupply of pressure to the inlet port 26. During this olt rammin oeration the sur e .orts 21 rovider means for the ready flow of the airconfined in the cylinder 8, thereby preventing the formation of a vacuumand causingthe machine to operate easily. To facilitate this noperation, avport 4:0 is drilled in the wall of the plunger 9 in suchposition as to be uncovered when the plunger 9 reaches its upper strokelimit during jolting.

It will be seen from the foregoing that my invention is simple incharacter, occupies a minimum amount of space and is so constructed thatit may be readily applied to standard forms of power squeezers totransform them into jolt and squeeze machines. 7 7 r v Itwill be notedthat the machine as thus transformed is economical in operationbecauseof the fact that a jolting piston of relatively small area is used.- Fora squeezing operation, a plunger having a largeefiective area isrequired in order to secure the pressure requisite to properly squeeze"the mold. Such a large area, however, is-unwould waste considerablepressure. WVith a jolt plunger of small dimension, this wast age isavoided.

-I claim: I r

1. A change-over jolt attachment for a squeezer molding machinecomprising a member adapted to v cooperate with the squeezer cylinder, aplunger working in said member cooperating with the squeezer plun ingsaid chc nge-over plunger for a jolt ramming operation. v a

2. A change-over jolt attachment for a squeezer molding machinecomprising a necessary for jolting purposes and if used, TTi

, ger, and-means for supplying air for operatmember adapted to besecuredto the squeezer cylinder, a plunger cooperating -with thesqueezer plunger, and means for supplying air for operating saidchangeover plunger fora joltcramming operation;

3. A change-over jolt attachmentfor asqueezer molding machinecomprising. a member adapted to be secured to .the squeezer cylinder, aplunger cooperating with the squeezer plunger, and a valve controllingthe air supply for said changeover plunger to secure a j oltingoperation;v

v 4. A change-over jolt attachment for a squeezer molding machinecomprising". a

.member adapted to cooperate with the squeezer cylinder and providedwith a plunger cooperating withthe squeezer plunger and means forsupplying air for a jolting operation.

squeezer molding" machine comprising a member adapted I to cooperatewith, the squeezer cylinder and provided-with a pluno ger cooperatingwith the squeezer plunger inder adapted to be secured to the bottom ,7

5. A change-,overljolt attachment {for a of the squeezer cylinder, aplunger working therein adapted to be secured to the squeezer plunger,and means iorsupplying air for a joltin operation;

7. change-over jolt attachment for a squeezer molding machine comprisinga cylinder adapted to be secured tov the bottom of the squeezercylinder, a plunger working therein adapted to be secured to thesqueezer plunger, and an automatic valve for coning in the squeezercylinder and cooperate with the squeezer plunger, means for introducingfluid pressure under the squeezer plunger for the squeezing operation,and means for introducing fluid pressure under the jolt plunger for thejolting operation.

9. A combined jolt and squeeze ramming molding machine comprising asqueezer cylinder havingan opening in the bottom, a squeezer plungerworking in said cylinder, a smaller jolt cylinder depending below thesqueezer cylinder, a joltplunger movable with the squeezer plunger andprojecting through the opening in the bottom of the squeezer cylinderand working in said jolt cylinder, means for introducing fluid pres'sure under the squeezer plunger for the squeezing operation, and meansfor introducing fluid pressure under the jolt plunger for the joltingoperation.

10. A combined jolt and squeeze ramming molding machine comprising asqueezer cylinder having an opening in the bottom, a squeezer plungerworking in said cylinder, a smaller jolt cylinder depending below thesqueezer cylinder, a jolt plunger movable with the squeezer plunger andprojecting through the opening in the bottom of the squeezer cylinderand working in said jolt cylinder, means for introducing fluid pressureunder the squeezer plunger for the squeezing operation, and means forintro ducing fluid pressure under the olt plunger for the j oltingoperation, and valve mechanism in the jolt cylinder in position to beengaged by the jolt plunger for controlling the jolting operation. c

In testimony whereof I have hereunto signed my name.

THOMAS J. MUMFORD 2ND.

Copies of this patent may be obtained. for five cents each, byaddressing the Commissioner of Iatents, Washington, D. G.

